All Common Core: High School - Geometry Resources
Example Questions
Example Question #21 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 29 for B , 108 for A and 131 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #22 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 27 for B , 120 for A and 116 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #23 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 27 for B , 123 for A and 111 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #24 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 15 for B , 97 for A and 100 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #25 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 16 for B , 43 for A and 109 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #26 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 2 for B , 79 for A and 99 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #27 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 16 for B , 78 for A and 47 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #28 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
To the nearest hundredth, solve where, , , and .
The first step is to create a picture
Since we have 2 angles, we can solve for the 3rd angle easily.
Now we can use the Law of Sines to figure out one side
Recall the Law of Sines
Now plug in 29 for B , 55 for A and 187 for a , and solve for the missing side.
Remember to round to the nearest hundredth.
Now we need to solve for the last side of the triangle.
To solve for this, we can use the Law of Cosines.
Lets recall the Law of Cosines.
Example Question #93 : Similarity, Right Triangles, & Trigonometry
Using the Law of Cosines, solve for . Round to the second decimal place.
We will begin by defining the variables in our equation.
We will let
Next we plug our values into our formulas and solve for .
Example Question #21 : Apply Laws Of Sines And Cosines: Ccss.Math.Content.Hsg Srt.D.11
Which of the following expressions properly states the Law of Cosines? Use the following triangle for reference.
The Law of Cosines should look similar to a theorem we use quite commonly for right triangles. The Law of Cosines is basically the Pythagorean Theorem, but it has an added argument so that it is true for any and all triangles.
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